What do you mean "didn't change"?

…is removed from the beginning of the list. The indices for all remaining items will shift down by 1. However, because their content hasn’t changed, React will not re-render them, assuming that the components with the same keys didn’t change. This can lead to bugs, especially when your components have a state or lifecycle, because the state…

3+1 React common mistakes that trigger unnecessary re-renders

155

Riccardo Bertolini

Mohith Gupta

Jun 29, 2023

What do you mean "didn't change"? You literally removed an item from the list, why would react think the content did not change? and why wouldn't react rerender it when the length of the list has changed?

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Written by Mohith Gupta

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A Better Person than Yesterday, I guess? In the process of Learning

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